Mold for artificial teeth.



J. KOHN.

MOLD FOR ARTIFICIAL TEETH. 'APPLIOATION FILED APR.10, 1912.

1,031,555 Patented July 9,1912;

Fig; 1

' F865 2W 3 y- 15 E197 E214 I15 IF &

TTOFPNEY 7 To all-whom it may-concern:

I have invented a certain new and useful Mold for ArtificialTeeth, of which thezfol;

zrosnrn :KOHN, or inimu s, PENNSYL ANIA.

' Mom). FOR ARTIFICIAL TEETH.-

Be itknown that 1,.JOSEPH-KQHN, a citi zen of the United States, residing at: 3404.

Market street, Philadelphia, in the county of Philadelphia and State of Pennsylvania,

lowing is aspecification.

The purpose of my invention is to provide means for inserting a refractory liner within-a portion. only of the side of a tooth cavity during. the molding of the tooth,

preferably-anchoring one end within the tooth.

'A' further purpose of my invention is to provide temporary lateral support throughout substantially its entire length, for a longitudinally extending liner for the side of a tooth cavity, leaving a liner face'exposed for pin engagement.

I have preferred to illustrate mylinvention by forms thereof, which I have found to-be simple, inexpensive and effective, and

which at the same time well illustrate the princlples of my invention.

- Figure 1 1s a transverse section of the parts of a .tooth' mold with a tooth, two

liners and their post support in place. Fig. 2 is. a plan view of the =botto1n'part of the mold shown in Fig. 1', adapted for units of three teeth, with posts and liners in plaee.' .Fig. v3 is a perspective of one form of post showing one liner in position and another about to beput in place. Fig. '{l is aper'spective of my preferred form. of liner.

Fig. 5 is atransverse longitudinal section through a tooth and two liners of a shorter form, with a'pin soldered to thelin'ers.

Fig. 6 is a'perspective of a post supporting a'single short liner only. Fig. 7 is a trans-- verse longitudinal section of a tooth having a single liner within it and the pin soldered to ,the liner. v In order to increase the soldering surface of refractory material within av tooth cavity and extend: it over'the entire lengthen the or group.- I suppo'rt'one or more liners .6,

'shown in Fig. '1, within-a cavity 7,.by means ot a post 8 to provide for ultimateinsertion Specification of Letters Patent. Application an A r l '10, 1912. Serial No. seams.

I [and soldering of a pin 9 (Fig. 5}, so that the pin can be soldered to the liner'thronghs Patented July 9,1912.

out the length of the cavity. The post. holds.

the liner or liners, supports them laterally during the molding operation," and. cores the cavity to the size and-shape of the i'ela tively inexpensive pin which is to be in .serted finally. I" preferito slot the post 19,

as at 10v and ll for insertion of. the "outer endsof the liners 6, 6'. 1 form thevend or the post 8 with a contour conforming to that of the liner or liners, where they are to be supported, preferably with a flat or with flats upon the side or side's at 12,-

against which the face or faces .13. of the liner, ultimately to be exposed for solderinn purposes rest. The remainder of the cor tour of the post conforms tothalT-of the 2 pin to be used, Preferably, theinners'idesof the slots'or kerts llland 11 aline with the flattened surfaces of the post so that their inner sides thereof.

constitute extensions ,The kerfs or slotslO and 11 are most useful when they have parallel sides so'that.

the liner or liners may fit fairly snuglyi therein and be prevented from swinging."

movement away from the flattened sideface or faces, of the post.

means of preventing'this swinging move-..

Obviously, other;

ment might be used, and, in the forni shown in F 1g. 6,1 omltthe slots and rely upon an adhesive to retain the liner in position,

though'not so tenaciously as to prevent ready Witlnlrawal of the post after mold-- ing. I prefer to,nse a..s0ift wax as at 14. .Upon the inner end of'the liner, I provide an anchorage to extend into the tooth body, preferably as a flange extending awayfroin v the 0st at anfangl'e. to the flat of the liner pas ,il' ustrated at 15. It holds the inner end of the liner. in fixed posit nat the inner j end of the cavity. The slotting or kerfing of.. the post, leaves relative projections 16 which, when the molding -'.is completed, throws the ends 17 of the liner, into relief, 2'. e .'leave themexplosed. They give jaddi:

tional soldering surface where the ends,

extend beyond the tooth.

In. he'fnrmshown in Sand -,7,

- which difierin the number of liners .fprQ- vided, the ends of the liner, are not ex-" tended beyond the surface of the tooth. In.

producing. these teeth, the kerfing -at" 10 and 11 not required since the wax holds the line '5 ngrin .1? from one-01f the parks mui fla't'kene upon one slmped fuses of H side in mymwinatien with a liner supported operations uttened surface and terminat- Nhere but, a single liner 1 chum x.

1; bum "Wines of the character state top ettom mold parts, 11 post; secured in she ate, pmjeeting therefrom, 532$- upon one side of the wojection anci pzioximiiy to the med side, 7 run W .;h a, cavity .L er With 0neinJQlitiCfl, Wine 0. mg: in She slot of ihe p w seeulie by Let- 1". In. device of the charm: stated, 00- loz operating mold parts; a non-circular post (w ice supported in one part, in combination with 35 and be meld p :i i. Finn/15y liner sunperted aguiilst the side of 'he vest and. cmmmning;- t0 the shape of the a the bottom meld teeth s nce zmd I post. the prnjpwi' finer supp 530 2. 1" a dew e cboltom m iid-- purine,

JOSEPH KQOH'N. 

